estimate_character_width_canonical: squash a -Wsign-conversion warning

diff --git a/lib/common/textspan_lut.c b/lib/common/textspan_lut.c
index 77977576fb716f1a2b355dd4e60a5c1fc80392cf..1825e6a5a5d4c61e10fe93507caf8c7c76c43810 100644 (file)
--- a/lib/common/textspan_lut.c
+++ b/lib/common/textspan_lut.c
@@ -813,7 +813,7 @@ estimate_character_width_canonical(const short variant_metrics[128],
     width = 0;
   }
   assert(width >= 0);
-  return width;
+  return (unsigned short)width;
 }
 
 double estimate_text_width_1pt(const char *font_name, const char *text,